Elements of astronomy: accompanied with numerous illustrations, a colored representation of the solar, stellar, and nebular spectra, and celestial charts of the northern and the southern hemisphere (1875)
Lockyer, Norman, Sir, 1836-1920 · New York, D. Appleton and company · leaf 237
A Prism, refracting a Eat of Light. consequence of refraction? Illustrate this with Fig. 88. 413. How is refractionbest studied ? How can refraction be shown with a prism ? 414. What is meantby the Spectrum ? Mention the colors of the spectrum in order. Why do thecolored rays occupy different… … Fig. 90.—The Spectkum. being caused to deviate the least from the course of theoriginal beam, and violet the most. This separation oflight into the different colors of the spectrum is calledDispersion. By passing the decomposed beam through a secondprism placed in contact with the first, as in Fig.…
Astronomy
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